leuffgen



2 Sheets-Sheet 1.

G. LEUPPGEN.

REGENERATIVE FURNACE.

(No Model.)

Patented Mar. 3, 1885.

\ moans N. PETERS, Phctu-Lilhogmphor. \Vashmghm, D. c,

(No Model.) 2 Sheets-Sheet 2v G. LEUPFGEN.

REGENERATIVE FURNACE.

Patented Mar. 3, 1885.1

55v) ante v N. PETERS. PhoZo-Lillwmphcr. wmm m. u. c.

iJNrTEb STATES PATENT @FFTCE.

GEORG LEUFFGEN, OF BRUNSHAUSEN, NEAR STADE, PRUSSIA, GERMANY.

REGENERATIVE FURNACE.

QPECIPICATION forming part of Letters Patent No. 313,348, dated March 3, 1885.

Application filedSeptember 25, 1882. Renewed October 1, 1884.

(No model.) Patented in Germany August 4, 1882, No. 22,399;

in France August 12, 1882, No. 150,6l; in Belgium August 14, 1882, No. 58,7178; in England August 24. 1882, No. 4,064. and

in Austria October 8, 1882, No. 27,203.

To all whom it may concern.-

Be it known that I, GEoRG LEUFFGEN, of Brunshausen, near Stade, in the Kingdom of Prussia, German Empire, have invented an 5 Improvement in Regenerative Furnaces, of which the following is a specification, reference being had to the accompanying drawings, in which similar letters indicate corresponding parts.

Figure 1 is a horizontal section through the entire apparatus. Fig. 2 is a vertical section in the line y y of Fig. 1. This figure shows the greater portion of the valve removed, its location being indicated by the part B. Fig. I5 3 is a vertical section in the linear a; of Fig. 1. This figure is drawn on an enlarged scale. Fig. 4 is a vertical axial section of the reversible valve. Fig. 5 is a horizontal section in the line z z of Fig. 4. The two latter figures 2c are drawn on a still more enlarged scale.

The regenerative furnaces constructed and built hitherto labor under the disadvantages of frequent interruptions of their working, and much expenditure for repairing, the ashes and other impurities clogging up the passages, and the fire-bricks of the regenerator melting or burning away. The object of the present invention is to remedy these deficiencies and to furnish a regenerative furnace which is sim- 0 ple in construction, durable, and not liable to come out of order, which mixes the air and the generator-gas thoroughly and creates a very high temperature in the combustion-chamber. The gas generated by any suitable fuel and 5 in acommon usual generator,A,passes through the reversible valve B into and along the channel at until it is deflected upwardly by the oblique wall 0. The atmospheric air entering at 1 passes, guided by the properly-set damper 0 m, into and along the channel I), which is sep arated from the channel a by a brick wall, and becomes gradually heated as it travels along this brick wall, which is brought to a high temperature by the hot gases passing through the channel a. The extreme end of the channel b is bent in such way as to reach the oblique wall 6. The air conducted by this channel btherefore strikes the wall e and is deflected upwardly. By this means the hot genorator-gas and the hot air meet on the top of the wall 6, ignite, and, mixed thoroughly, rise into the combustion-chamber D. The heat here becomes very intense and the flame very pure, as all the impurities of the generatorgas, the soot, the tar, 860., are deposited during the long way it has to travel. .The products of the combustion pass from the combustion-chamber D through the channels a b into the chimney g. The chimney takes up through the channel a only as much of the products of the combustion as is necessary to create a sufficient draft, which is effected by the damper or arranged in the conduit K, so that as little as possible of the generator-gases are used to'maintain the draft, the larger part of them passing through the channel 0 to the chimney g, and giving off their heat to the brick wall between a and b. These two channels a 1), extending from the generator A to the combustion-chamber D, are alike to those a b, above described, and arranged symmetrically to them. This conduit K connects the chamber of valve B to the junction of the channels I) b, and between these parts, in the said conduit K, are located the chimneyg and valve n.

lVhen it is desired to change the direction of the two streamsgenerator-gas and air the reversible valve Bis turned for ninety degreesthat is to say, the communication between the generator A and the channel a isinf errupted, and that between A and the channel a opened. for ninety degrees into the position shown in Fig. 1 in dots. The hot generator-gas is now compelled to pass from A, through the channel a, into the combustion-chamber, heating the dividing brick-wall between the channels a and b. The aireutering through Zgoes into and along the channel I), and, mixed at the top of the oblique wall 6 with the generator-gases, into the combustion-chamber D. The products of combustion pass by the channels a and 1) into the chimney g.

After one of the channels a or a is used for some time as the direct passage from the generator, it becomes clogged with soot, tar, &c., which occasions great difficulty in the draft. By changing the valve B so as to throw the gases as they issue from the generatorinto the The damper m is turned also troughs.

other passage, the flame produced in the chamber D by the commingling of the heated gases and heated air is passed back to the chimney 9 through the passage filled with soot, &e., and said soot, &c., is burned and the passage cleaned out. last-used passage will itself be cleaned out.

I have shown the passages a b a 1) straight in full lines in Figs. 1 and 2; but they are also made serpentine or zigzag, as shown in dotted lines in Fig. 1. This enables me to build the structure in a much shorter space, while having the same length of passage for the gases and air to travel in. The other mason-work may be built in brick or stone or other suitable material- In Figs. 1 and 2 the reversible valve B is only sketched; but as this apparatus possesses some peculiarities it is shown in Figs. 4 and 5 on alargerscale. The valve consists of a cylindrical iron vessel, B, without bottom. The upright diametrical partition H is hollow, so that a stream of water may enter through the cock 0. This water evaporating when the valve is in use protects the partition against the effects of the high temperature of the gases. The vessel B stands with its under edge in an annular trough, E. The trough Eis provided with two diametrical canals, F F, into either of which the partition 11 may be dropped. As the troughs E and F are filled with water, a goodjoint is established as well against the air outside the vessel B as between the two in ner compartments of it, which are formed by means of the partition H. When the partition stands as in Fig. 1, the generator A communicates with a, and K with a. When it stands as shown by the dotted lines in Fig. 1, the generator A communicates with a, and K with a. The reversing'valve B is hung up by the central shaft, t, and lever q to a ring-plate, 0, which is supported by the standards 1). The plate 0 can revolve on rollers or on a slidering provided on top of the standards. As soon as the weighted end of the lever g is depressed the vessel B is lifted clear over the edges of the water-trough E F. By meansof the lever q the shaft t, and with it the vessel B, is now turned for ninety degrees, whereafter it is let down again into the water of the In this way the valve B is brought from one position into the other.

In the finished construction of the apparatus, the generator A is connected to the passages a and a. by having a channel, A, entering inside the trough E, as shown in Figs. 4 and 5.

When the supply of gas has to be suddenly interrupted or stopped, the quadrantshaped opening of the gas channel A is covered and totally closed by the cover G fitting with its downwardprojecting rim into the quadrant of the water trough E F. This cover G forms usually a part of the ceiling of the vessel B, and is jointed to it by means of a water or sand joint, 8, and a-bolt, J, run- By again changing the valve the ning through the arched cross-bar r. The cross-bar r is supported on the valve B, and the nut on the bolt J is accessible from the exterior. The nut of the bolt J being unscrewed, the cover G falls down, closing the gas-opening A totally and stopping the working of the regenerating-furnace entirely. If the work after a short or long interval be taken up again, the cover G is lifted to its former high position, and secured by the bolt J to the ceiling of the vessel B, which is then turned into the right position, as above explained.

What I desire to claim as myinvcntion is- 1. In a regenerative furnace, the combination, with the gas -generator located at one end of the structure, of two sets of air and gas passages, each set constructed to lie side by side, and provided with an oblique wall in the gas-passages, so that the air will travel round the end of the passages before meeting an obstruction and then mingle with the gas, as herein set forth.

2. In a regenerative furnace, the combination, with a generator, A, and a double set of air and gas passages, and a valve for directing the gases into either, of an intermediate passage, K, communicating at one end with the gas-passages and controlled by the same valve, so as to be broughtinto connection with one or the other, and communicating with the air-passages at the other end, and being made to connect with either by means of a valve, m, and a chimney, g, in communication with the passage K, substantially as set forth.

3. In a regenerative furnace, the combination, with the generator A and double set of gaspassages, of the valve B, located at the junction of the generator and the passages, and having the partition H,adapted to be manipulatedto out ofi t-he communication be tween one or the other gas-passage and the generator, as herein set forth.

4. In a regenerative furnace, the hereindeseribed valve having a body or circular chamber, B, and a partition, H, in combination with the valve-seat, consisting of a circular trough, E, and diametrical canals F F, said trough and canals containing sealing-water, as set forth.

5. In a regenerative furnace having a generator and gas passages communicating through the medium of a valve, the combination, with said generator and "alve, of a supplemental valve or cap, G, forming a part of the main valve under ordinary circumstances, and having provisions for detaching it from said main .valve and dropping it over the generator-opening, as herein set forth.

This specification signed by me this 31st day of July, 1882.

GEORG LEUFFGEN.

Witnesses:

CHR. AUG. W. ScHoN, H. SGHRADER. 

